Diesel carburetor attachment



19, 2 D. R. BARNETT 2,607,570

DIESEL CARBURETOR ATTACHMENT Filed Aug. 26, 1946 INVEN TOR.

Daniel R. Barneii. BY

I ATTORNEY.

Patented Aug. 19, 1952 UNITED STATES PATENT OFFICE DIESEL CARBURETORATTACHMENT Daniel R. Barnett, Long Beach, Calif.

Application August 26, 1946, Serial No. 693,142

2 Claims. (01. 261-18) This invention relates to a diesel oil carburetorattachment which can be mounted on the usual internal combustion enginewhereby diesel fuel can be burned in the engine.

An object of my invention is to provide a novel diesel oil carburetorattachment which may be mounted between the usual gasoline carburetorand the intake manifold, and which will meter diesel fuel into theintake manifold when the throttle valve of the attachment is opened.

An object of my invention is to provide a novel diesel oil carburetorattachment which can be simply and easily mounted on the usual internalcombustion engine, and is provided with a control operatingcoincidentally with the throttle valve of the gasoline carburetor.

Another object of my invention is to provide a novel diesel oilcarburetor attachment of the character stated in which the meteringvalve operates simultaneously with the throttle valve.

A feature of my invention resides in the novel means of closing thethrottle valve of the gasoline carburetor when the diesel carburetorattachment is being operated.

Other objects, advantages and features of invention may appear from theaccompanying drawing, the subjoined detailed description and appendedclaims.

In the drawing:

Figure 1 is a side elevation of my diesel carburetor attachment withparts broken away to show interior construction.

Figure 2 is a side elevation of the same showing the side opposite tothat illustrated in Figure 1.

Figure 3 is a sectional view taken on line 33 of Figure 1.

Figure 4 is a side elevation of the metering valve disc.

Figure 5 is a perspective view of the carburetor attachment.

Referring more particularly to the drawing, my diesel carburetorattachment I is mounted between the gasoline carburetor 2 and the intakemanifold 3. My attachment consists of an adapter 4 which is bolted toone end of the carburetor 2, and at the other end to the intake manifold3. A bore 5 extends vertically through the adapter to permit the flow ofgas from the carburetor 2 into the intake manifold. The adapter 4 isformed as a T and a second bore 6 extends horizontally into the bore 5.An air horn I opens into the bore 6 and this horn is bolted or otherwisefixedly attached to the side of the adapter 4.

An air valve 6 is urged into closed position by the spring 9. A gasolinethrottle valve I0 is mounted in the bore 5 on the shaft I I. Thisthrottle valve controls the flow of gases from the gasoline carburetor 2and replaces the usual carburetor throttle valve. A diesel throttlevalve I2 is mounted in the bore 6 on a shaft I3. A diesel fuel meteringvalve I4 consists of adisc fixed to the shaft I3. This valve is formedwith an arouate tapered groove I5, the purpose of this groove being tometer the fuel into the carburetor as will be further described.

An intake duct I6.in the body of the adapter 4 opens against the face ofthe disc I4. An outlet duct I'I also opens against the face of the discI4 and is spaced from the duct I6. The groove I5 operates over the openends of the ducts I6-II and into the taper of this groove. The amount offuel passing from I6 into I! will be determined by the position of thegroove I5.

A fuel intake pipe I8 extends into the duct I6 and a fuel outlet pipe I9extends from the duct I1. The fuel outlet pipe I9 extends into anexhaust pipe 20 which extends from the exhaust manifold 2I into the airhorn 1. Thus the metered fuel is carried into the bore 6, together witha small quantity of hot exhaust gases. The diesel fuel will thus beheated and will also be atomized by the exhaust gases flowing throughthe pipe 20.

A throttle arm 2I is attached to the outer end of the shaft I3 and thisthrottle arm is controlled by the foot throttle of the vehicle (notshown). To close the throttle valve I0 when the throttle I2 is beingoperated, I may include the following structure: An arm 22 is attachedto the end of the shaft II. An arcuate spring finger 23 extends from thearm 22 and is engaged by the lug 24 on the throttle arm 2I. Thus as thearm 2| is swung downwardly as viewed in Figure 2, the lug 24 will engagethe end of the finger 23, and will swing the throttle I0 into closedposition. To hold the throttle I0 closed, I provide a pin 25 in the arm22 and this pin moves over the cam 26 and rides on the outer peripheralcurved edge of this cam while the arm 2I is moved to control throttlevalve I2. Thus the arm 2| can move back and forth to adjust the throttleI2 and the throttle I0 may be held closed. To release the throttle I0,the arm 2I is moved upwardly to the fullest extent, and the pin 25 willslip over the end of the curved surface of the cam 26, the pin 25 ridesover the inclined slope of the cam 26, and snaps over the outer edge ofthe cam to hold the arm 22, down, and the valve I0, closed. A

disc 14 moves with the arm 2! and these two parts are connected by a pin21. A coil spring 28 bears against the disc M to hold it tightly againstthe face of the adapter 4.

In operation, my carburetor attachment is intended to be used primarilywith a diesel fuel and the gasoline throttle I is only used in starting.Consequently, the throttle valves l0 and [2 are synchronously used instarting and then as soon as the engine starts the valve is latched in aclosed position. When the arm 21 is moved downwardly to open thethrottle I2, the finger 23 is engaged and this moves the throttle [0towards closed position. In other words, as the throttle I2 opens, thethrottle l0 closes. When it is desired to shut off the gasolinesupply,.the throttle I2 is moved to fully open position just momentarilyand this moves the pin 25 over the face of the cam 26 and causes the pin25 to drop over the periphery of the cam 26 which holds the throttle I0fully closed and permits the throttle l2 to be manipulated from fullyclosed to almost fully open position.

Having described my invention, I claim:

1. A carburetor attachment comprising an adapter having a bore extendingtherethrough, and an air intake port opening into said bore, athrottle'valve in said port, a metering valve connected to said throttlevalve and operating coincidentally therewith said metering valveconsisting of a disc having a tapered groove therein, said adapterhaving a fuel intake duct and a fuel outlet duct, both of said ductsopening against the face of the said disc, and a fuel outlet pipeextending from the outlet duct into the air intake port, a secondthrottle valve mounted in said bore, an arm attached to said secondthrottle valve, a finger extending from said arm, a second arm attachedto the first named throttle valve and means on the last named arm,engaging said finger, whereby the second throttle valve is closed whenthe first named throttle valve is opened, a cam on the last named arm, apin on the first named arm engaging said cam, whereby the secondthrottle valve is heldin closed position.

2. A carburetor attachment comprising an adapter having a bore extendingtherethrough, and an air intake port opening into said bore, a throttlevalve in said intake port, a second throttle valve mounted in said bore,an arm attached to said second throttle valve, a finger extending fromsaid arm, a second arm attached to the first named throttle valve, andmeans on the last named arm engaging said finger whereby the secondthrottle valve is closed when the first named throttle valve is opened,a cam on the last named arm, a pin on the first named arm engaging saidcam whereby the second throttle valve is held in closed position.

DANIEL R. BARNETT.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,374,262 Wasserlein Apr. 12,1921 1,801,684 Olerich Apr. 21, 1931 2,114,548 Stadlman Apr. 19, 19382,206,824 Behling 1 July 2, 19 40 2,339,867 Mann Jan. 25, 1944 FOREIGNPATENTS Number Country Date 15,825 Great Britain Nov. 9, 1915 r-fr

